Parkinson's disease is the result of
A) excess production of GABA by neurons in the basal nuclei.
B) decreased levels of acetylcholine from neurons in the substantia nigra.
C) inadequate production of dopamine by substantia nigra neurons.
D) hyperactivity of the limbic system.
E) weak response of the red nuclei of the mesencephalon.
C
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The fluid entering the distal convoluted tubule is hypoosmotic with respect to plasma.
Answer the following statement true (T) or false (F)
Developmentally, when is myelination complete?
A. It is completed during week 14, after fertilization. B. It is complete by the 7th month of development. C. It is complete just before birth. D. It is complete by the first year after birth. E. It is not complete until late adolescence.
Preganglionic fibers of parasympathetic neurons are present in all of the following cranial nerves except
A) III. B) VII. C) IX. D) X. E) XII.
The amount of blood pumped out of a ventricle in one minute is the
A. cardiac output. B. heart rate. C. cardiac cycle. D. stroke volume.